Chinese Journal of Quantum Electronics, Volume. 42, Issue 3, 295(2025)
Mechanism of vitamin C and 9,10⁃anthraquinone photoinduced reaction based on time⁃resolved photoluminescence spectroscopy technology
The photoinduced reactions between antioxidant vitamin C (VC) and 9,10-anthraquinone (AQ) in excited triplet state were studied using time-resolved electron paramagnetic resonance spectroscopy and transient absorption spectroscopy techniques in different ethylene glycol-water micelle solutions prepared with different kinds of surfactants, such as nonylphenol polyoxyethylene ether, sodium di (-2-ethylhexyl) succinate sulfonate, sodium dodecyl sulfate (SDS), and cetyltrimethylammonium bromide (CTAB). The results indicate that the reaction mechanism between VC and AQ in homogeneous and micelle solutions is essentially hydrogen atom transfer. By comparing the bimolecular reaction rates between AQ and VC in different micelle solutions, it is found that the charge type of the surface charge layer of the micelles has a decisive impact on the reaction rate. Specifically, the anionic shell of SDS micelles will reduce the reaction rate by electrostatic repulsion of VC anions, while the cationic shell of CTAB micelles will greatly accelerate the reaction rate by electrostatic attraction of VC anions.
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Yaxiong WEI, Tingting FU, Yi LIU, Xinsheng XU. Mechanism of vitamin C and 9,10⁃anthraquinone photoinduced reaction based on time⁃resolved photoluminescence spectroscopy technology[J]. Chinese Journal of Quantum Electronics, 2025, 42(3): 295
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Received: Dec. 22, 2023
Accepted: --
Published Online: Jun. 11, 2025
The Author Email: Yaxiong WEI (Davidl@mail.ustc.edu.cn), Xinsheng XU (xxsheng@mail.ahnu.edu.cn)